OH! Me, me, I want to join in! I nursed dd all through my last pregnancy and she did not stop, even when the milk was gone. It hurt sometimes too, but I'll never forget the look on her face when the milk came back (she pulled back and looked up at me with the biggest grin and milk on her lips).
Anyway, I started out this preg. with both kids still nursing but dd has given up, not ds2 though. Occasionally when he is nursing, dd will ask me, "has the milk come back?" when I say no she loses interest and goes away. Im so glad because her latch was driving me up the wall. I feel guilty because when she was still nursing I was constantly telling her to wait or making her let go, but then she started falling to sleep without it and then started sleeping all night wihtout waking to nurse, yea! Anyway, we will see if she goes back to it once the milk comes back.
To answer the tandem nursing question, nursing the older kid actually was a tremendous help to me, because I NEVER got engorged! I would ask her if she would come get bop-bop because it was too full and she was more than happy to oblige!
Slightly o/t but when we first brought the baby home (I nursed her in the morning, left, had the baby at the birthing center and we were home by dinner time, that was awesome) she was very standoffish, then I was nursing him and she came and stood in front of me and just dropped her head down into her hands. She looked so devastated! Then I said, "Do you want bop-bop too?" (bop bop comes from her early attempts to say boppy in refrence to the boppy pillow we used, because when she wanted to nurse I'd say "bring the boppy" and she'd say "bop" and it just evolved from there. Of course ds picked up it as well, even dh calls it bop bop. Bop Bop is a noun and a verb at my home....bf and the actual boob). Anyway, when I asked if she wanted bop bop too, her whole face lit up and we tandemed for the first time. Once she knew she still had her bop bop, she was much more open to the baby.